JPH0326974B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for measuring jaw movement, and particularly to a device that directly displays upper and lower jaw movements.

[Prior Art] A device has been proposed that measures the movement of the lower jaw by attaching a light source to the lower jaw and detecting the movement of the light source with an optical sensor (Japanese Patent Application Laid-open No. 89296/1983). This device is
A light source that emits light forward is attached to the mandibular gums, and a light sensor is placed in front of the light source through a lens.The signal from the light sensor is amplified and recorded on the XY recorder and data recorder. .

Furthermore, as another jaw movement measuring device, a device that detects the movement of the lower jaw using three potentiometers has been proposed (Japanese Utility Model Application Publication No. 54-34290). This device has a frame fixed to the patient's head, and uses three potentiometers to detect the forward-backward, left-right, and up-and-down movements of the lower jaw.

[Problems with conventional methods] However, these conventional jaw measurement devices cannot directly display the movement of the jaw.The electrical signals must be processed and then displayed on an XY recorder or monitor scope. The drawback was that it was complicated and extremely expensive.

Furthermore, since the locus of jaw movement is displayed through arithmetic processing, there is also the drawback that jaw movement cannot be displayed in real time.

Furthermore, in order to measure jaw movement, an accurate movement trajectory cannot be measured unless the person wearing the device practices the jaw movement several times and then measures when the measurer moves the jaw to its maximum range of movement. For this reason, it is important to be able to reliably measure the trajectory of jaw movement during movement.

The present invention has been developed with the aim of eliminating these drawbacks of the prior art, and an important objective of the present invention is that the entire device can be manufactured at a significantly lower cost;
An object of the present invention is to provide a jaw movement measuring device that directly displays jaw movements and can be conveniently used.

Another important object of the present invention is to provide a jaw movement measuring device that can directly display the relative movement of the jaws and thus measure jaw movements simply and easily in real time.

Furthermore, another important object of the present invention is that the marking time of the printed member can be controlled, and when the patient moves his or her jaw reliably after sufficient practice, the heater of the printed member is energized to accurately control the jaw movement trajectory. To provide a jaw movement measuring device that can be displayed on a recording sheet.

[Means for Solving Conventional Problems] A jaw movement measuring device includes a recording sheet and a print member that displays a movement locus on the recording sheet. The recording sheet and the print member are attached to a jaw that moves relative to each other via an attachment device, the record sheet and the print member are moved relative to each other with the jaw, and the movement locus of the jaw is recorded on the record sheet using the print member to record the jaw movement. configured to measure. The recording sheet is thermal paper, and the printing member has a heater in a portion that contacts the recording sheet. The heater is controlled by a recording state control means to control the recording time.

[Operations and Effects] In the preferred embodiment of the present invention shown in FIGS. 1 and 2, recording sheets 1a and 1b and print members 2a and 2b are attached to the upper and lower jaws, respectively. FIG. 1 shows a portion for recording the movement of the upper jaw relative to the lower jaw, and FIG. 2 shows a portion for recording the movement of the lower jaw relative to the upper jaw.

As shown in FIG. 1, the mandible recording sheet 1b is mounted vertically in front of and above the mandible, and the maxillary print member 2a is mounted on the upper jaw by contacting or approaching one side of this recording sheet 1b. When the lower jaw moves, the lower jaw recording sheet 1b moves together with the lower jaw, and the movement of the upper jaw relative to the lower jaw is recorded.

In addition, in FIG. 2, a maxillary recording sheet 1a is mounted vertically in front of and below the maxilla, and a mandibular print member 2b whose tip touches or approaches one side of the maxillary recording sheet 1a is attached to the lower jaw. will be installed on the When the lower jaw moves by opening and closing the mouth, the lower jaw print member 2b moves together with the lower jaw, and the movement of the lower jaw relative to the upper jaw is recorded on the upper jaw recording sheet 1a.

That is, recording sheets 1a and 1 are placed on both the upper and lower jaws.
b and print members 2a, 2b are attached and the lower jaw moves, the locus of movement of the jaw is recorded separately on the two recording sheets 1a, 1b.

In this way, the method that measures jaw movement using a plurality of recording sheets and print members has the advantage of being able to accurately measure jaw movement.

The locus of the jaw movement is displayed when the heater of the printing member comes into contact with a recording sheet made of thermal paper. The heater is controlled by a recording state control means, and the jaw movement locus is recorded on two recording sheets.

The recording sheet and printing member made of thermal paper and a heater can directly display the jaw movement locus, and like conventional measuring devices, the electric signal that electrically detects the jaw movement is input into a computer etc. for calculation. There is no need for this, and the entire device can be significantly simplified and manufactured at a significantly lower cost.

Furthermore, since the movement of the jaw is directly displayed, the method of use is simple and easy to understand, and even a first-time user can use it simply, easily, and conveniently. This means that
This is especially important for this type of device, which is not widely used, and cannot be widely used for measuring devices that are complicated to use.

Furthermore, since the relative movement of the jaw can be measured in real time, the feature of being able to measure the trajectory of jaw movement extremely quickly can be realized.

Furthermore, a noteworthy feature of the present invention is that it is possible to record one cycle of jaw movement by repeating jaw movement practice many times while wearing the device and being able to move the jaw accurately, making it possible to record the jaw movement trajectory of all people. The reason is that it can be measured extremely accurately. This feature is realized by the fact that the recording state can be controlled by the energization state of the heater of the printing member. In other words, with thermal paper, unless the heater of the print member is energized, even if the print member moves on the recording sheet, its movement trajectory is not recorded, and only when the heater is energized, the contact movement portion of the print member is recorded. Ru. Therefore, the jaw movement can be reliably performed, and since only the time periods in which the patient can reliably move the jaw can be selected and recorded, the jaw movement can be measured particularly accurately.

Furthermore, by changing the current applied to the heater, it is possible to add shading to the recorded jaw movement locus. As shown in Figures 1 and 2, when different jaw movement trajectories are recorded on multiple recording sheets, synchronization points of movement time can be added to each recording sheet, and the jaw movement It also becomes possible to conduct a more detailed and precise analysis.

[Preferred Embodiment] Hereinafter, one embodiment of the present invention will be described based on the drawings.

The jaw movement measuring device shown in FIGS. 3 to 6 is
Recording sheets 1a and 1b that are attached vertically to the upper and lower jaws separately, and these recording sheets 1
Print member 2 with jaw movements added to a and 1b
It consists of a and 2b.

The recording sheet consists of an upper jaw recording sheet 1a that is attached to the upper jaw, and a lower jaw recording sheet 1b that is attached to the lower jaw.

The print member consists of an upper jaw print member 2a that is attached to the upper jaw, and a lower jaw print member 2b that is attached to the lower jaw.

The upper jaw print member 2a is the lower jaw recording sheet 1b.
, the lower jaw print member 2b is attached to the upper jaw recording sheet 1a.
in contact with or close to.

Although the present invention does not specify the structure and mounting position of the recording sheet and the print member on the upper and lower jaws, the recording sheet and the print member are as shown in FIGS. 3 and 4. It can be most easily attached to the upper and lower jaws via the attachment tool 3 that extends along the outer periphery of the upper and lower teeth.

The mounting tool 3 shown in FIGS. 3 and 4 has an inner surface that is
It is formed in a shape that follows the outer periphery of the front teeth, and is fitted and fixed around the outer periphery of the teeth.

Although not shown, it is also possible to fix the recording sheet and print member to the head that moves together with the upper jaw instead of directly fixing it to the upper jaw, and the member fixed to the lower jaw can also be fixed directly to the lower teeth. It is also possible to fix it to the lower jaw instead.

The recording sheet is thermal paper, and the printing member is formed into a rod shape with a heater at the tip that contacts the recording sheet.

For members whose recording state can be electrically controlled, such as thermal paper, the device is attached to the patient and the patient practices jaw movements several times (the locus of movement is not recorded at this time).
After the jaw movement can be performed successfully, control is performed so that the jaw movement is recorded for only one cycle.

In a combination of a recording sheet and a printing member whose recording state can be controlled, as shown in FIG. 7, for example, by adding shading to the recording line at intervals of 0.02 to 0.5 seconds, recording is performed on the upper and lower recording sheets. Time synchronization marks can be added to the jaw movement trajectory.

That is, as shown in FIGS. 8 and 9, it is possible to accurately detect which positions the upper and lower print members pass at the same time in the recorded jaw movement locus.

For example, number the starting point with number 1, then
By sequentially numbering 2, 3, 4, etc. to the darkly plotted points, the relative position of the upper and lower jaw movements at a specific time can be specified.

In this way, the ability to specify the upper and lower jaw movement trajectories is convenient when inputting the upper and lower jaw trajectories into a computer to calculate the movement of the lower jaw.

The density of the recording locus on the recording sheet can be determined by making the current flowing through the heater correspond to the waveform shown in FIG. 7 and increasing the intensity in a pulsed manner at regular intervals.

The recording sheets 1a and 1b can be made entirely in the form of a hard sheet and can be replaced as a whole, but it is possible to fix the substrate to the upper and lower jaw connectors and attach and detach the recording paper to the surface of this substrate. It is convenient to attach and use.

The recording paper can be adhesive tape such as double-sided adhesive tape,
Alternatively, it can be easily attached to the substrate using a magnet or the like.

Since the printing member is attached to the surface of the recording sheet to record the movement trajectory of the jaw, as shown in FIG.
a, 2b are rubber-like elastic bodies, elastic bodies 5 such as tension springs, etc.
It is preferable to hold it and push it out elastically so that the leading edge comes into contact with the surfaces of the recording sheets 1a and 1b.

A heater is fixed to the tip of the print member.

Electric power is supplied to the heater of the printing member through lead wires.

How to use the jaw movement measuring device configured in this way is to insert the upper and lower recording sheets 1a,
1b and print members 2a and 2b are attached to the jaw,
Print members 2a, 2b are recording sheets 1a, 1b
The relative movement of the upper and lower jaws can be recorded on the upper and lower recording sheets 1a and 1 with the mouth wide open and closed.
Record in b.

[Brief explanation of the drawing]

1 and 2 are schematic side views showing an embodiment of the present invention, FIGS. 3 and 4 are schematic perspective views of a jaw movement measuring device showing an embodiment of the present invention, and FIGS. 5 and 4 are schematic side views showing an embodiment of the present invention. Fig. 6 is a front view and right side view of a jaw movement measuring device showing an embodiment of the present invention, Fig. 7 is a graph showing signal waveforms for shading printed members, and Figs. 8 and 9 are upper jaw prints. It is a graph showing the jaw movement locus displayed on the member and the lower jaw print member. 1a... Upper jaw recording sheet, 1b... Mandibular recording sheet, 2a... Upper jaw print member, 2b... Mandibular print member, 3... Mounting tool, 4... Tube, 5...
Elastic body.

Claims (1)

[Claims] 1. Consisting of a recording sheet and a print member that displays a movement trajectory on the recording sheet, the recording sheet and the print member are attached to a jaw that moves relative to each other via an attachment device, and the recording sheet and the print member are In a measuring device configured to measure jaw movement by moving the jaw relative to the jaw and recording the movement trajectory of the jaw on a recording sheet using a printing member, the recording sheet is thermal paper and the printing member is a recording sheet. 1. A jaw movement measuring device, comprising a heater in a sheet contacting portion, and the heater is controlled by a recording state control means. 2. The printing member is rod-shaped, and the mounting device has a tube through which the rod-shaped printing member is inserted so as to be freely removable and removable, and an elastic body that elastically presses the tip of the printing member against the recording sheet. The jaw movement measuring device described.